Versatile Compatibility: Standard 1/4" barbed fittings support common FR polyethylene or copper tubing installations

providing the consistent current necessary to drive integrated control boards

Key Benefits for Technicians: Constant Differential Performance: Maintains a fixed 13°F swing to prevent short-cycling and ensure stable temperature gradients

the Emerson Alco 052955 (XB-1019RC1B) Power Element is the industry standard for restoring precise superheat control

Engineering for heavy-duty performance

Lochinvar & A.O. Smith 100109891 Gas Valve 321702-401 Versatile Compatibility: Standard 1/4" barbedThe Lochinvar & A. O. Smith 100109891 Gas Valve is a critical OEM replacement part designed for high recovery commercial water heaters and boilers. Engineered for precision, this 24V natural gas valve operates with a 3. 5" WC manifold pressure to ensure stable combustion and optimal thermal efficiency. Built with a rugged 3 4" NPT connection, it is a direct substitute for legacy part numbers such as 9004497205 and 192015, providing a reliable solution